Inventors:
Marcelo E. Lopez-Claros - Raleigh NC
International Classification:
A61N 506
Abstract:
Disclosed is a method and apparatus for the treatment of a variety of biopsychiatric disorders, for example Seasonal Affective Disorder, by preferentially directing light therapy to the non-dominant hemisphere of the brain. Specifically, the visual fields associated with the non-dominant cerebral hemisphere are stimulated to a greater degree than the visual fields associated with the dominant cerebral hemisphere by taking advantage of the characteristics of the human optical system, including the visual fields, the retina and its neuronal connections, and the distribution of neuronal pathways and their crossing at the optic chiasm before eventual arrival at the brain. The preferred apparatus for carrying out the method of the invention includes a mask-like device positioned in front of the patient's eyes that provides therapeutic illumination preferentially to the visual fields associated with the patient's non-dominant cerebral hemisphere by dividing the visual field of each eye into temporal and nasal visual fields. The apparatus includes two sets of two chambers, a temporal and a nasal chamber in front of each eye, that are each open to the respective eye at one end and separated from one another by divide, which divide the visual fields. The dividers are adjustable so that the device can be adapted to accommodate varying interpupillary distances from patient to patient.